✨ feat: Add auth flow (#146)

This adds a simple way to incorporate a centralized authentication flow.

The idea is to have the user, API and SSH (for machine authentication)
all in one place using `openauthjs` + `SST`

We also have a database now :)

> We are using InstantDB as it allows us to authenticate a use with just
the email. Plus it is super simple simple to use _of course after the
initial fumbles trying to design the db and relationships_

packages/cli/cmd/run.go

@@ -0,0 +1,26 @@
+package cmd
+
+import (
+	"nestrilabs/cli/internal/auth"
+
+	"github.com/charmbracelet/log"
+	"github.com/spf13/cobra"
+)
+
+var runCmd = &cobra.Command{
+	Use:   "run",
+	Short: "Run a new Nestri node",
+	Long:  "Create and run a new Nestri node from this machine",
+	Args:  cobra.NoArgs,
+	RunE: func(_ *cobra.Command, _ []string) error {
+		credentials, err := auth.FetchUserCredentials()
+		if err != nil {
+			return err
+		}
+
+		log.Info("Credentials", "access_token", credentials.AccessToken)
+		log.Info("Credentials", "refresh_token", credentials.RefreshToken)
+
+		return nil
+	},
+}